Results 11 to 20 of about 6,159 (262)
Flow-through microfluidic relative permittivity sensor using highly-doped silicon sidewall electrodes [PDF]
Journal of Micromechanics and MicroengineeringAbstract This paper reports a flow-through sensor for the real-time measurement of the relative permittivity of a flowing fluid. The proposed sensor contains multiple parallel microchannels. Each channel acts as a parallel plate capacitor in which the electrodes are isolated from the fluid.
M J S Bonnema +4 more
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Inline and Real-Time Microfluidic Relative Permittivity Sensor Using Highly Doped Silicon Sidewall Electrodes [PDF]
2024 IEEE 37th International Conference on Micro Electro Mechanical Systems (MEMS)This paper reports an inline sensor for thereal-time measurement of the relative permittivity of acontinuously flowing fluid, with electrodes that areelectrically isolated from the fluid. The sensor has beencharacterised for relative permittivity values ranging from1 to 80 – including water and water-containing mixtures –showing an accuracy within 3 ...
Bonnema, Maarten J.S. +4 more
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Sensors, 2023 Glycerin is a versatile organic molecule widely used in the pharmaceutical, food, and cosmetic industries, but it also has a central role in biodiesel refining.
Miguel Monteagudo Honrubia +3 more
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Complementary Metamaterial Sensor for Nondestructive Evaluation of Dielectric Substrates
Sensors, 2019 In this paper, complementary metamaterial sensor is designed for nondestructive evaluation of dielectric substrates. The design concept is based on electromagnetic stored energy in the complementary circular spiral resonator (CCSR), which is concentrated
Tanveer ul Haq +3 more
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Chemosensors, 2021 We describe a highly sensitive quartz sensor for measuring changes in the relative permittivity of liquids flowing in microchannels. The proposed method uses a highly stable oscillator and capacitance-dependent quartz crystal together with a capacitance ...
Vojko Matko, Miro Milanovič
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High-Sensitive Microwave Humidity Sensor Using Polyvinyl Alcohol/Carboxymethyl Cellulose (PVA/CMC) Composites [PDF]
SensorsThis study investigates the humidity sensing characteristics of microwave sensors coated with polyvinyl alcohol/carboxymethyl cellulose (PVA/CMC) composites with different weight percentages. The microwave sensor has a band-stop filter characteristic and
Junho Yeo, Younghwan Kwon
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Sensors, 2022 This paper proposes a microwave sensor based on a high-sensitivity slot-loaded rectangular microstrip patch antenna (MPA) for measuring microliter-volume liquid chemicals with high relative permittivity and high loss tangent.
Junho Yeo, Jong-Ig Lee
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picoSMMS: Development and Validation of a Low-Cost and Open-Source Soil Moisture Monitoring Station [PDF]
SensorsSoil moisture exhibits high spatio-temporal variability that necessitates dense monitoring networks, yet the cost of commercial sensors often limits widespread deployment. Despite the mass production of low-cost capacitive soil moisture sensors driven by
Veethahavya Kootanoor Sheshadrivasan +4 more
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Estimation of Relative Permittivity and Thickness for Dielectric Materials Using an Open-Ended Waveguide Sensor [PDF]
, 2016 The main goal of this thesis has been to conduct a feasibility study on an open-ended waveguide sensor as a tool for estimating the relative permittivity and thickness of dielectric layers in the thickness range 0.5-5 cm. To achieve this purpose, a reflection coefficient measurement technique was implemented.
Nikparvar, Bahareh
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A New Chipless RFID Permittivity Sensor System
IEEE Access, 2021 Permittivity sensing is commonly utilized in multiple fields for various applications. In this study, an enhanced RFID (Radio Frequency Identification) permittivity sensor system is designed. Additionally, we investigated the signal processing procedures
Yang Wang +4 more
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